To raise funds for the American effort in The Great War heiress Betty Hallowell decides to lease her beautiful country house to Mrs. Wentworth, a wealthy widow whose son Tom is recuperating from injuries received overseas. When Mrs. Wentworth suddenly demands the services of a maid for the summer, Betty, unable to secure a servant on such short notice, dons a dark wig and poses as "French maid Bettina." Tom and “Bettina” fall in love much to his mother’s dismay but when the deception is finally revealed all ends well.